Determining Planck's Constant with LEDs: Investigating the Photoelectric Effect and Electronic Light Sensors Kit | Carolina.com

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Determining Planck's Constant with LEDs: Investigating the Photoelectric Effect and Electronic Light Sensors Kit

Item # 754030 New Online Only
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Grades 9–12. Take a smartphone selfie and you're using the photoelectric effect. Students establish relationships among light frequency, wavelength, and energy using LEDs while calculating Planck's constant. Investigate the wave and particle models of light as students calculate threshold voltages to turn on LEDs (photoelectric effect) and measure wavelength using a diffraction grating. The photoelectric effect and the discrete nature of quantum mechanics is addressed as well.

Price

$129.95

In stock and available to ship.

Grades 9–12. In 3 experiments, students determine the wavelength of 4 LED colors and construct a circuit to find the threshold voltage of the LEDs. This is used to calculate frequency and energy, and to generate a mathematical model for Planck's constant.

PE: HS-PS4-3
Related PE: HS-PS3-3
Time Requirement: 90 minutes

SEP: Using Mathematics and Computational Thinking
CCC: Systems and System Models
DCI: HS-PS4.B Electromagnetic Radiation

Take a smartphone selfie, walk through an automatic door, or turn on your television with a remote, and you're using light sensors based on the photoelectric effect. In this comprehensive kit students:

  • Investigate light sensors and the photelectric effect
  • Build circuits to determine Planck's constant
  • Learn how light-emitting diodes (LEDs) and transistors function

Students establish relationships among light frequency, wavelength, and energy for LEDs while collecting data to calculate Planck's constant. Investigate the wave and particle models of light as students calculate threshold voltages to turn on LEDs (photoelectric effect) and calculate wavelength using a diffraction grating. The photoelectric effect and the discrete nature of quantum mechanics are addressed, laying the foundation for this lab.

Activities are designed for 4 groups working in 4 student teams. FREE 1-year access to digital resources that support 3-dimensional instruction for NGSS included.

The activities in this kit build toward the following Performance Expectations of the Next Generation Science Standards*: HS-PS4-3, HS-PS3-3. This kit is designed to integrate into a larger unit of lessons addressing wave mechanics, electricity, magnetism, and electromagnetism.

*Next Generation Science Standards® (NGSS) is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.

  • This item is only available at Carolina.com.
 
Components Qty Included?
Carolina Science Online® Resources (1-year subscription) 1 Included
Teacher's Manual with Reproducible Student Guide 1 Included
Mini Breadboard 1 Included
LED, Red 1 Included
LED, Yellow 1 Included
LED, Green 1 Included
LED, Blue 1 Included
LED, Infrared 1 Included
Hookup Wire, 100" (22 AWG) 1 Included
Resistor, 330 Ω 1 Included
Resistor, 100 kOhm 1 Included
Resistor, 100 Ohm 5 Included
Transistor, 2N2222 1 Included
Potentiometer, 11 kOhm 1 Included
Diffraction Grating 4 Included
D-Cell Battery Holder 16 Included
Alligator Clip Leads 30 Included
Digital Multimeter 8 Needed, Not Included
D-Cell Battery 16 Needed, Not Included
Wire Stripper 1 Needed, Not Included
Meter Stick or Tape Measure 1 Needed, Not Included
Electrical Tape 1 Needed, Not Included
Graph Paper 4 Needed, Not Included
Ring Stand (optional) 1 Optional, Not Included
Burette Clamp (optional) 1 Optional, Not Included
Universal Clamp (optional) 1 Optional, Not Included
Scientific Calculator (optional) Optional, Not Included
Remote Control (optional) 1 Only Available with Kit Purchase
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